A piece for string ensemble consisting of children which introduces them to New Music. The composer manages to combine the sound and noise levels of the instruments with the language element. – With 'Klangrätsel', Iris ter Schiphorst won the 'ad libitum' competition which is sponsored by the Stuttgart Society for the Promotion of 'Music of the Centuries' together with the Winfried Böhler Arts Foundation and contributes to the expansion of the repertoire of contemporary music for children.